I use it. I have not had any problems with it. The only 'problem' I had with it was when the photos were not locked as private. Other people could see them and make a comment which would generate an email to you that a comment was made. Spam, because it was messages about how hot I look and such. Yet the photos they could see were only landscapes without any people in them. I just locked those galleries as well and problem was solved.
Oh when you lock a gallery, you can give it a password. Then email a link to who you wan to share the gallery with and provide them with the password. -- Cry "Havoc!" and let slip the dogs of war